I have hyperhydrosis in my hands and feet and since I have been using Rehmannia Six Combination for about 2 months now since the beginning of June 2011 it has been working great. It took about a week for the herbs to kick in, but once it did I noticed a big difference. Only thing is when I am about to come on my monthly cycle my hands and feet still sweat but not as bad prior to this herb. When it is extremely hot outside too I still sweat a lot. Also iHerb offers the lowest prices and the most inexpensive shipping.